sierra ski resorts, as you might expect road conditions to get there do require chains this morning, on u.s. 50 to south lake tahoe it begins at twin bridges. controls on interstate 80 over donner begin at kingvale. >> eastbound on i-80, they did encounter a lot of snow until they got here near cisco grove. many drivers like steve decided to chain up before they were required to do so. >> this is my first time putting chains on. >> this is actually some of the faster traffic. as you can see. it's not moving that fast. >> i don't have a four-wheel drive vehicle so i have to chain up. >> ken's dog may find the chaining process fascinating but not everyone was excited. >> i'm getting tired of it. >> despite the rough ride, most agreed now is the time to get the hard part out of way to clear the path for a fun weekend. >> katie: storm is causing problems for travelers, as well. yesterday, at sfo, flights were cancelled, others were delayed for hours. plenty of passengers frustrated there. for up to the date information on flight cancellations and delays, just go to the flight tracker on the fro